Share-Based Compensation (Grants of Stock Options and RSUs) (Details) - $ / shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Stock Options [Member]
Equity awards, granted, in shares	1,285,257	1,524,625
Weighted average fair value per award, in dollars per share	$ 17.17	$ 15.49
RSUs [Member]
Equity awards, granted, in shares	265,964	317,073
Weighted average fair value per award, in dollars per share	$ 102.81	$ 89.69
Phantom Share Units (PSUs) [Member]
Equity awards, granted, in shares	311,158	357,096
Weighted average fair value per award, in dollars per share	$ 111.04	$ 106.06